The typical asking rate per listing is in the $0's per square foot per year. The Irvington submarket is seeing a decrease in rates. In the last 3 months, the median rate fell $71 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 0 listings have been made available, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the office spaces in the Irvington are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around sqft. Most buildings in this market were built in 1950 and are Class A.